WP_Post_Type::add_rewrite_rules()

Source

			add_post_type_support( $this->name, 'autosave' );
		}
	} elseif ( false !== $this->supports ) {
		// Add default features.
		add_post_type_support( $this->name, array( 'title', 'editor', 'autosave' ) );
	}
}

/**
 * Adds the necessary rewrite rules for the post type.
 *
 * @since 4.6.0
 *
 * @global WP_Rewrite $wp_rewrite WordPress rewrite component.
 * @global WP         $wp         Current WordPress environment instance.
 */
public function add_rewrite_rules() {
	global $wp_rewrite, $wp;

	if ( false !== $this->query_var && $wp && is_post_type_viewable( $this ) ) {
		$wp->add_query_var( $this->query_var );
	}

	if ( false !== $this->rewrite && ( is_admin() || get_option( 'permalink_structure' ) ) ) {
		if ( $this->hierarchical ) {
			add_rewrite_tag( "%$this->name%", '(.+?)', $this->query_var ? "{$this->query_var}=" : "post_type=$this->name&pagename=" );
		} else {
			add_rewrite_tag( "%$this->name%", '([^/]+)', $this->query_var ? "{$this->query_var}=" : "post_type=$this->name&name=" );
		}

		if ( $this->has_archive ) {
			$archive_slug = true === $this->has_archive ? $this->rewrite['slug'] : $this->has_archive;
			if ( $this->rewrite['with_front'] ) {
				$archive_slug = substr( $wp_rewrite->front, 1 ) . $archive_slug;
			} else {
				$archive_slug = $wp_rewrite->root . $archive_slug;
			}

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